I don t use QEMU /KVM just a plain regular rbd image format 1 map and
mounted to a real machine that is used as proxy for data droping to ceph.
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Alphe Salas
I.T ingeneer
On 07/17/2014 02:57 PM, Christoph Hellwig wrote:
On Thu, Jul 17, 2014 at 11:27:31AM -0700, Sage Weil wrote:
I assume you are using kvm/qemu? It may be that older versions aren't
passing through trims; Josh would know more. Or maybe the trim sizes are
too small to let rados effectively deallocate entire objects. Logs might
help there.
At least for the qemu version from a few month ago that I'm using in my
testing I explicitly have to enable passthrough of UNMAP/TRIM on the
qemu command line.
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